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Table 7 Summary of Surface Water Monitoring Sites, Seneca II Mine, Routt County, Colorado Site Name Drainage and Elevation Type of Flow Measurement and Remarksl,2 (Computer ID.) (See Exhibit 7-2) NPDES 002 Lower Little Grassy Creek (NPDE 52) 6614 feet NPDES 003 Discharges into Lower (NPDES3) Grassy Creek, 6577 feet NPDES 004 Vpper Coa Camp Creek (NPDES9) 6947 feet NPDES 007 Vpper Bond Creek (NPDES7) NPDES 008 Upper Bond Creek (N PDESS) 7015 feet SW-S2-1 Upper Gras ay Creek (SSG1) 6595 feat SW-S2-2 Lower Graeay Creek (SSG2) Water quality at 6565 feet CSG at 6575 feet SW-52-3 Lower Northwest DiVei9lon Ditoh (SSG3) (see Exhibit 7-7) SW-5-4 Upper Northwest Diver9ion Ditch (55G4) SW-S-S Upper Little Grassy Creek (SSLGS) 6790 feat SW-52-6 Upper Cow Camp Creek (SSC6) 6575 feet SW-32-7 Secondary inlet to Wadge Impoundment (SSLG7) Sw-52-8 Gully at Wolf Creek revision area (S SRS) SW-52-9 Upper Bond Creak (3589) u Continuous recorder with 3-foot R-flume (site referred to as Wadge Impoundment) Continuous recorder with 2-foot B-flume (site referred to as Shop Reservoir or Northwest Impoundment) Continuous recorder wiU 1-foot Parshall flume Continuous recorder with 1-foot Parshall flume, discontinued Continuous recorder with 1-foot Parshall flume, replaces NPDES 007 Crest Stage Gaga (CSG) site, Q = VA Quality sample taken at site below NPDE9 003 discharge; Q = VA, CSG upstream of NPDES 003 discharge on Lower Grassy Creek (reported flows include NPDES 003 flow) Monitored fly ash area drainage; discontinued when Colorado Ute Electric Ae sociation bought property; reinstituted June 1997 Discontinued per CMLRD's response to the Seneca II Mine 1983 ABR (April 1984) CSG site, Q ~ VA (high flow), Q = B d S (low flow) Q = VA (high flowl, Q B 6 S (low flow); CSG site, discontinued 1997 Discontinued (primary inlet is Little Grassy Creak) Temporary site; destroyed by mining Q VA (high flow), Q - B 6 S (low flow); CSG site Discontinued, replaced with NPDES 008 • • D F